The 'Les Miserables' actress - who previously revealed she "lived on hummus and radishes" to lose 25 pounds to play prostitute Fantine in the movie - says she is ashamed of being so consumed by staying slim but blames her celebrity status.

Asked if she thinks about her weight daily, she told E! News: "If I'm honest, yes. There's an obsessive quality to it that I thought I would've grown out of by now. It's an on-going source of shame for me.

"I just think about the ridicule you get if you have an off day. If people weren't watching, I'd be so much more eccentric...I actually really don't feel like getting made fun of. So I put on something boring and navy and go out and try to disappear."

The 29-year-old newlywed - who married Adam Shulman in late September - also revealed that she decided to change her lifestyle after filming her critically acclaimed movie 'Rachel Getting Married', for which she earned an Oscar nomination in 2008, when her relationship with Italian real estate developer Raffaello Follieri crumbled because he was jailed for fraud and embezzlement.

She said: "I realised that the life I'd been living [was not authentic] and that I had to make a change.

"Then I found out that my trust had been betrayed quite massively. So for me, that call came at the end of 2007.

"I'm letting go of those expectations, and that's opening me up to moments of transcendent bliss. But I still feel the stress over 'Am I thin enough? Am I too thin? Is my body the right shape?'"